package com.tensquare.user.interceptor;

import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import util.JwtUtil;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class JwtInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtUtil jwtUtil;

    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,Object object) throws Exception{
        System.out.println("经过了拦截器");
        //无论如何都放行，具体能不能操作还是具体的操作中去判断
        //拦截器只是负责把头请求头中包含的token的令牌进行一个解析验证
        String header = request.getHeader("Authorization");

        if(header!=null && "".equals(header)){
            //如果包含有Authorization头信息，就对其进行解析
            if(header.startsWith("Bearer ")) {
                //得到令牌
                String token = header.substring(7);
                //对令牌进行验证
                try {
                    Claims claims = jwtUtil.parseJWT(token);
                    String roles = (String)claims.get("roles");
                    if(roles != null && !roles.equals("admin")){
                        request.setAttribute("claims_admin",token);
                    }

                    if(roles != null && !roles.equals("user")){
                        request.setAttribute("claims_user",token);
                    }

                }catch (Exception e){
                    throw  new RuntimeException("令牌不正确");
                }
            }
        }
        return true;
    }
}
